Electrical window alarm-lock.



M. BARROS.

ELECTRICAL WINDOW- ALARM LOCK.

APPLIOATION FILED APR. 2B, 1913.

1,092,513. Patented Apr. 7', 1914.

COLUMBIA PLANOGRAPH co..W/\SH|NGTON. D. c

MANUEL BARROS,

OF NEW YORK,

ELECTRICAL WINDOW ALARM-LOCK.

Specification of Letters Patent.

Patented Apr. '7, 1914.

Application filed April 28, 1913. Serial No. 764,244.

To all whom it may concern:

Be it known that I, MANUEL Bannos, a subject of the King of Spain, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Electrical \Vindow Alarm-Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to burglar alarms, and has particular reference to that type of such devices which are electrically operated, and are designed particularly for ap plication to a window.

Many devices for closing or breaking the alarm circuit upon the raising of a window sash have been invented, but heretofore, within the knowledge of the present inven tor, there have been no alarm attachments for windows which combine mechanism for automatically closing an electrical alarm circuit, and simultaneously locking the window against further opening.

This invention, therefore, contemplates as its principal object the provision of a unitary device which will act to close an electrical alarm circuit when the window is raised and will hold the window sash locked against further upward movement.

A still further object is to provide means for permitting the window to be opened without closing the alarm circuit when the householder or occupant of the building so desires.

The above and additional objects are accomplished by such means as are illustrated in the accompanying drawings, described in the following specification and then more particularly pointed out in the claims which are appended hereto and form a part of this application.

With reference to the drawings, wherein I have illustrated the preferred embodiment of my invention as it is reduced to practice, and throughout the several views of which similar reference numerals designate corresponding parts: Figure 1 is a face view of the alarm lock, with the cover removed, illustrated in its assembled relation to a closed window. Fig. 2 is a section on the line 22 of Fig. 1. Fig. 3 is a face view ofthe alarm in disassembled position, part of the cover being broken away to clearly illustrate the interior mechanism.

Proceeding now to the description of the drawings, the numeral 1 designates a base plate secured to the inner vertical wall of a window casing by bolts, screws, or other suitable fastening means, as at 2. Arranged on the plate 1 and secured thereto by screws or other suitable fastening means 3, is a cylindrical casing or housing in which 4 designates the base wall, and 5 indicates the annular wall. The members 4 and 5 are formed of hard rubber or porcelain, or any other suitable nonconducting material, for a purpose which will be hereinafter clearly disclosed. A circular closure plate 6 is screw threaded into the member 5, as illustrated in Fig. 3.

The member 1 is mounted on the inner vertical face of the window casing, slightly above the upper horizontal edge of the lower sash of the window, indicated at 7 to permit a lever arm 8, pivotally mounted on a pin 9 eccentrically of the member 4: to normally lie at the lower terminal of a segmental slot 10, formed in the wall 5. As a means for normally holding the arm 8 in the lower end of the slot 10 and consequently in slight spaced relation to the upper edge 11 of the sash 7 there is provided a leaf spring 12, secured by a screw or other suitable fastening means, as at 13, to the wall 4, and arranged with its free end extending upwardly.

By reference to Fig. 1, it will be observed that when the arm 8 is swung to lie in the lower end of the slot 10, it will pass under the free end of the spring 12 and will be grippingly engaged thereby and held in the desired position until the sash 7 is raised, striking the segmental band 14: with a resultant upward movement of the arm 8. As a means for actuating the arm 8 to swing it into the upper end of the slot 10 after it has been disengaged from the slot 10 of the sash 7 there has been provided a coil spring 15 which may be formed of wire or other suitable resilient material wound around the pivot stem 9 and having one terminal secured as at 16 to the lever 8 and the other terminal secured to the member 4;, as at 17. The pivoted terminal of the lever 8 is enlarged to produce a substantially circular plate 18, to which is secured by a stud screw, or other suitable fastening means 19, a hook shaped arm 20, formed of wire or spring steel, or other resilient material, and provided at its free terminal with a substantially semicircular button 21. When the arm 8 is in the upper end of the slot 10, the button 21 is held against the curved edge 22 of a contact band 3 by the resiliency of the member 20.

In order to permit the lever arm 8 to rest in the upper end of the slot 10 and out of line with the sash 7 there is provided an arcuate stop arm 24, equipped with a segmental slot 25. The arm 2 1- is upturned at each terminal, as at 26 and 27, and is held in the desired position by a guide pin 28 secured to the member 1 exteriorly of the wall 5 and operating in the slot 25. It will be observed by reference to Fig. 3 that when the member 2-1 is pushed to bring the stop pin 28 at the inner terminal of the slot 25 an upturned end 27 will engage the exterior terminal of the member 8 consequently holding the button 21 out of engagement with the edge 22 of the contact ring 23.

The actual construction of the circuit closure for the electrical alarm circuit being thus disclosed, it now remains to describe the wiring and operation of the device. As regards the operation, it will be noted by reference to Fig. 1 that the positive wire of the battery or service wire is connected to the member 17, from which the current flows through the spring 15 through the members 9, l8 and 20, to the button 21. The negative wire is attached to a binding post 29 of the member 23. It will therefore be noted that in disposing the arm 8 in the lower end of the slot 10 it will be held against displacement by the spring 12, and the circuit will be broken, inasmuch as the button 21 is remote from the contact ring 23. When the sash 7 is raised, however, the upper edge 11 of the sash strikes the member 14:, carries the arm 8 out of engagement with the gripping spring 12 and the spring 15 acts to swing the member 8 into the upper terminal of the slot 10. When the arm 8 reaches the upper end of the slot 10, the button 21 contacts with the curved edge 2 of the member 23 and the circuit is closed, thus ringing the alarm. It will be further observed, however, that if the member 24 has been moved into the position indicated in Fig. 3, being held in this position by a gripping spring 30, that the upward movement of the sash will tend to disengage the arm 8 from the spring 12, and the arm 8 will be carried upwardly by the spring 15 as before, but when the member 8 approaches the upper terminal of the slot 10 it will strike the upturned terminal 27 of the member 2 1 and the button 21 will be held spaced from the member 22, as previously described, thus preventing the closing of the circuit. It is to be noted, of course, that the member 2 1 as well as the other portions of the alarm are interiorly operable, and cannot be reached from the exterior, reference being had in this connection to the interior of the house or other building in which the device is installed.

Having thus disclosed the actual construction and operation of the circuit closure, it now remains to describe the means employed in holding the window against upward movement after the alarm circuit is closed in the manner above described. This feature of the invention includes a hook member 31 hinged as at 32 to a laterally extending lug 33, carried on the plate 1. The hook member 31 is essentially an elongated metallic plate of sufiicient strength and rigidity to stand a considerable strain, and is equipped with a downwardly extending tongue 34 carried on its free terminal. Coacting with the member 31 and holding the window against further upward movement after the closing of the alarm circuit, is a latch tongue 35 also formed of tempered steel or similar material of equal strength. The member 35 carries a base plate 36 which is secured to the sash frame by screws, rivets, or any other suitable fastening means. It will be observed that after the member 7 has been raised sulficiently to close the alarm circuit, as above described, the latch 35 will engage the keeper hook 31 between the tongue 34 and the base plate 1, thus preventing further upward movement of the window and effectually frustrating the attempts of any intruders to gain entrance through the window. It is to be noted that the member 31 may be swung on its hinge 32 from a position of lateral extension from the member 1 into a position of parallel relation thereto, as illustrated in Fig. 3, permitting the unhindered raising of the sash.

In practice, I have found that the form of my invention, illustrated in the drawings and referred to in the above description, as the preferred embodiment, is the most eflicient and practical; yet, realizing that the conditions concurrent with the adoption of my device will necessarily vary, I desire to emphasize the fact that various minor changes in details of construction, proportion and arrangement of parts may be resorted to, when required, without sacrificing any of the advantages of my invention, as defined in the appended claims.

What is claimed is:

1. The combination with a window having an electrical alarm system, of a combined circuit closure including a cylindrical housing, a base plate for said housing, a lever arm having its inner terminal pivoted on said base plate eccentrically thereto and operating through a slot formed in the wall of said housing, a contact button carried by said lever arm, a contact member arranged in said housing, means for holding the said lever arm in operative position with the said button, spaced from said contact member, means for actuating said lever arm to bring said button in contact with said member when said lever arm is operated through the upward movement of the window sash, and separate adjustable means for holding the lever with the said button out of engagement with the said contact member upon upward movement of the said arm.

2. The combination with a window having an electrical alarm system, of a circuit closer including a housing, a contact member arranged therein, a contact lever pivoted in the said housing eccentrically thereto, a contact button, resilient means connecting said but-ton to said lever, means adapted for holding said lever in open circuit position with the said contact button spaced from said contact member, and exteriorly operable means for moving the said lever from closed circuit to open circuit position, said lever being normally disposed in open circuit position and being adapted to be swung upwardly into closed circuit position by the upward movement of the lower window sash. V

3. The combination with a window sash, having an electrical alarm circuit, of a circuit closer including a cylindrical housing, a contact member mounted in said housing, a contact button, a pivoted contact lever, resilient means connecting said button and lever, a spring clip adapted to hold said lever in open circuit position with said contact button spaced from said contact member, a spring adapted to force said contact lever upwardly into closed circuit position with the said contact button in engagement with said contact member upon the releasing of the said contact lever by the upward movement of the lower sash of the window.

In testimony whereof I aflix my signature in presence of two witnesses.

MANUEL BARROS. Witnesses:

MORRIS AUGERMAN, R. PINEUTE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPatents,

Washington, D. G. 

